/*-------------------------------------------------------------------------
 *
 * pg_statistic_ext.h
 *      definition of the system "extended statistic" relation (pg_statistic_ext)
 *      along with the relation's initial contents.
 *
 *
 * Portions Copyright (c) 1996-2017, PostgreSQL Global Development Group
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 * src/include/catalog/pg_statistic_ext.h
 *
 * NOTES
 *      the genbki.pl script reads this file and generates .bki
 *      information from the DATA() statements.
 *
 *-------------------------------------------------------------------------
 */
#ifndef PG_STATISTIC_EXT_H
#define PG_STATISTIC_EXT_H

#include "catalog/genbki.h"

/* ----------------
 *        pg_statistic_ext definition.  cpp turns this into
 *        typedef struct FormData_pg_statistic_ext
 * ----------------
 */
#define StatisticExtRelationId    3381

CATALOG(pg_statistic_ext,3381)
{
    Oid            stxrelid;        /* relation containing attributes */

    /* These two fields form the unique key for the entry: */
    NameData    stxname;        /* statistics object name */
    Oid            stxnamespace;    /* OID of statistics object's namespace */

    Oid            stxowner;        /* statistics object's owner */

    /*
     * variable-length fields start here, but we allow direct access to
     * stxkeys
     */
    int2vector    stxkeys;        /* array of column keys */

#ifdef CATALOG_VARLEN
    char        stxkind[1] BKI_FORCE_NOT_NULL;    /* statistic types requested
                                                 * to build */
    pg_ndistinct stxndistinct;    /* ndistinct coefficients (serialized) */
    pg_dependencies stxdependencies;    /* dependencies (serialized) */
#endif

} FormData_pg_statistic_ext;

/* ----------------
 *        Form_pg_statistic_ext corresponds to a pointer to a tuple with
 *        the format of pg_statistic_ext relation.
 * ----------------
 */
typedef FormData_pg_statistic_ext *Form_pg_statistic_ext;

/* ----------------
 *        compiler constants for pg_statistic_ext
 * ----------------
 */
#define Natts_pg_statistic_ext                    8
#define Anum_pg_statistic_ext_stxrelid            1
#define Anum_pg_statistic_ext_stxname            2
#define Anum_pg_statistic_ext_stxnamespace        3
#define Anum_pg_statistic_ext_stxowner            4
#define Anum_pg_statistic_ext_stxkeys            5
#define Anum_pg_statistic_ext_stxkind            6
#define Anum_pg_statistic_ext_stxndistinct        7
#define Anum_pg_statistic_ext_stxdependencies    8

#define STATS_EXT_NDISTINCT            'd'
#define STATS_EXT_DEPENDENCIES        'f'

#endif                            /* PG_STATISTIC_EXT_H */
